class Base {
    public Base(int a,int b) {
        System.out.println("a="+a+" b="+b);
    }
}
class Derived extends Base {

    public Derived(int c,int d) {
        super(2,3);

    }
}
public class Test2 {
    public static void main(String[] args) {
        Derived der = new Derived(4,5);
    }
}
